surface: osm.wiki/RU:Key:surface

surface:grade: osm.wiki/RU:Proposed_features/Surface_Quality

smoothness: osm.wiki/RU:Key:smoothness

landcover: osm.wiki/Landcover

3D: osm.wiki/RU:Simple_3D_buildings

POI: http://catalog.openstreetmap.ru/

taginfo: https://taginfo.openstreetmap.org/